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Ozone Hourly Averages

Ozone is a form of oxygen with three atoms instead of the usual two atoms. It is a photochemical oxidant and, at ground level, is the main component of smog. Unlike other gaseous pollutants, ozone is not emitted directly into the atmosphere. Instead, it is created in the atmosphere by the action of sunlight on volatile organic compounds and nitrogen oxides.

In Texas, higher levels of ozone usually occur on sunny days with light winds, primarily from March through October. An ozone exceedance day is counted if the measured eight-hour average ozone concentration exceeds the standards.

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Click on the Plot Data button once the tabular report has been generated to open a separate window containing data plots.
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Ozone Hourly Averages for Wednesday, June 19, 2024.
measured in parts per billion
Mid 1:00
Dallas-Fort Worth - all times are in CST
13 33 FEW 13 2 R MDL TCEQ
17 31 FEW 17 2 R MDL TCEQ
31 38 FEW 31 1 R MDL TCEQ
56 31 FEW 56 1 R MDL TCEQ
63 35 FEW 63 1 R MDL TCEQ
69  1 32 FEW 69  1 1 R MDL Other Gov
70 28 NA 70 1 R MDL TCEQ
73 36 FEW 73 1 R MDL TCEQ
75  2 37 FEW 75  2 1 R MDL TCEQ
76 30 FEW 76 1 R MDL TCEQ
77 36 NA 77 1 R MDL TCEQ
401  3 33 FEW 401  3 3 R MDL Other Gov
402  1 30 FEW 402  1 1 R MDL Other Gov
1006 23 FEW 1006 1 R MDL TCEQ
1032 36 FEW 1032 1 R MDL TCEQ
1044 29 FEW 1044 1 R MDL TCEQ
1051 32 FEW 1051 1 R MDL TCEQ
- These sites are maintained and operated by the City of Dallas.
- These sites are maintained and operated by AECOM for North Texas Commission (NTC).
- These sites are maintained and operated by the City of Dallas (Met NOx O3 SO2 CO).

TCEQ does not certify the validity or quality of data it hosts from other monitoring entities.
Maximum values for the day are bold within the table. Minimum values are bold italic.
 R - Data from this instrument meets EPA quality assurance criteria for regulatory purposes.

PLEASE NOTE:  This data has not been verified by the TCEQ and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from TCEQ ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.

Following EPA reporting guidelines, negative values may be displayed in our hourly criteria air quality data, down to the negative of the EPA listed Method Detection Limit (MDL) for the particular instrument that made the measurements. The reported concentrations can be negative due to zero drift in the electronic instrument output, data logger channel, or calibration adjustments to the data. Prior to 1/1/2013, slightly negative values were automatically set to zero.